The Operational Command of Poland's Armed Forces said it had deployed "all necessary forces and resources at its disposal" to ensure the safety of Polish airspace and was "monitoring the situation on an ongoing basis."
Polish and allied aircraft were activated in the morning, the Operational Command said in a statement, adding that measures were taken to ensure security in areas near the Ukrainian border.
At about 7 a.m., the Operational Command said the threat of Russian missile strikes on regions bordering Poland had decreased and that Polish and allied aircraft were returning to base.
It reported no violations of Polish airspace during the attacks.
"We thank NATO Air Command and the Spanish Air Force, whose aircraft helped ensure security in Polish skies today," the Operational Command said.
It also thanked the Dutch armed forces "for their support with the air defence systems."
Russia launched a fresh wave of missile and drone strikes on Ukraine overnight into Tuesday, killing at least three people, damaging houses and triggering fires, officials said.
The attack came as President Volodymyr Zelensky warned on Monday of an imminent, mass Russian attack on the country, citing Ukrainian intelligence, the Reuters news agency reported.
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Source: IAR, PAP, polskieradio24.pl, Ukrinform, Reuters